Results 51 to 60 of about 1,351 (190)

A Vast Valley Network Beneath the Greenland Ice Sheet

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Mapping subglacial topography along the margin of the Greenland Ice Sheet was revolutionized by reconciling measurements of ice thickness and surface velocity using the principle of mass conservation. Despite evidence that many subglacial valleys resolved by that method extend upstream, it cannot be applied to the ice sheet's slower‐flowing ...
Allison M. Chartrand, Joseph A. MacGregor, Mathieu Morlighem, Olga V. Sergienko, Helen Ockenden, William T. Colgan, Gong Cheng   +6 more
wiley   +1 more source

Ground Penetrating Radar Radargram Filter using Singularity Expansion Method

2020 International Applied Computational Electromagnetics Society Symposium (ACES), 2020
In this paper, the singularity expansion method (SEM) is used to improve the signal-to-clutter ratio of radargrams obtained with a ground penetration radar (GPR). SEM allows to select the poles of the GPR signals corresponding to unwanted signals, clutter, and also reflections of specific buried objects.
Eder Ruiz, Daniel Chaparro-Arce, John Pantoja, Felix Vega, Chaouki Kasmiv, Fahad Al Yafei   +5 more
openaire   +1 more source

Incoherently Summed SHARAD Radargrams of the South Polar Layered Deposits, Mars

, 2018
Full-resolution .tif files of the 86 incoherently summed radargrams analyzed in Whitten and Campbell (2018). Each radargram has been individually stretched to increase the contrast in each image and an ice depth correction has been applied, assuming a ...
Jennifer L. Whitten (18414858), Bruce Campbell (9039485)   +1 more
core   +1 more source

Automatic Segmentation of Ice Shelves with Deep Learning

, 2021
Radar sounders (RSs) provide information on the subsurface of the cryosphere through the use of electromagnetic (EM) signals by producing radargrams. Radargrams are used to detect and analyze relevant targets in the subsurface of icy regions.
Elena Donini, Miguel Hoyo Garcia, Donini, Elena, Bovolo, Francesca, Garcia, Miguel Hoyo, Francesca Bovolo   +5 more
core   +1 more source

“Cold Tropics”: Permafrost Existence and Thickness on Eastern Nevado Coropuna (Southern Peruvian Andes) Revealed by Ground‐Penetrating Radar and Geoelectrical Soundings

Permafrost and Periglacial Processes, Volume 37, Issue 3, Page 517-534, July/September 2026.
ABSTRACT The existence of permafrost was explored at tropical latitude on Nevado Coropuna (southern Peruvian Andes) using a combination of ground‐penetrating radar (GPR) and vertical electrical sounding (VES) in order to strengthen the mutual validation of data processing and interpretation.
Velnia Chacca, Ramón Pellitero, Adriano Ribolini, José Úbeda, Luis Mariano del Río, Ricardo Vila, Oscar Vilca   +6 more
wiley   +1 more source

An Adaptive Non-Reference Approach for Characterizing and Assessing Image Quality in Multichannel GPR for Automatic Hyperbola Detection

Applied Sciences
The automation of the detection infrastructure in GPR imagery is a key issue, particularly in the context of the non-invasive acquisition of radargrams with a multi-antenna ground-penetrating radar.
Klaudia Pasternak, Anna Fryśkowska-Skibniewska, Łukasz Ortyl   +2 more
doaj   +1 more source

Modeling the Water‐Ice Bounding Layers in the Massive CO2 Ice Deposits, South Pole of Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 7, July 2026.
Abstract Recent orbital radar observations point to a massive reservoir of solid CO2 near Mars' South Pole, which contains bounding layers (BLs) of water ice. Here, we examine the impact of the water ice bounding layers on the thermo‐mechanical behavior of the MCID.
Kasra B. Fard, Isaac B. Smith, Nicole‐Jeanne Schlegel   +2 more
wiley   +1 more source

Reconstructing unseen spaces in collapsed structures for search and rescue via deep learning based radargram inversion

, 2022
This paper developed a novel deep learning-based approach to processing ground-penetrating radar (GPR) radargrams to reconstruct the occluded interior spaces of collapsed structures and extract essential information such as survivable void spaces to ...
Chen, J, Li, S, Hu, D
core   +1 more source

First Detection of the Two‐Dimensional Vertical Propagation of Traveling Ionospheric Disturbances Associated With Atmospheric Gravity Waves in the Martian Ionosphere

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract We report the detection of a traveling ionospheric disturbance (TID) captured by the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) Active Ionospheric Sounding (AIS) instrument aboard the Mars Express spacecraft at 150–250 km altitude.
Rong Tian, Beatriz Sánchez‐Cano, Chunhua Jiang, Mark Lester, Dikshita Meggi, Simon Joyce, Christopher M. Fowler, Andrea Cicchetti, Mats Holmstrom, David Andrews, Pedro Machado   +10 more
wiley   +1 more source

Deciphering transitions within ice–debris complexes in the Northern Tien Shan through surface characteristics and internal structure

Earth Surface Processes and Landforms, Volume 51, Issue 5, May 2026.
Geophysical (GPR and ERT) data reveal a transition from buried glacial ice to an ice–debris mixture within ice–debris complexes in Kazakhstan; this transition is reflected in surface morphological and kinematic characteristics. We identify some relationships between internal ice content and associated surface kinematics but caution against ...
Ella Wood, Tobias Bolch, Vassiliy Kapitsa, Francesca Baldacchino, Viktor Blagoveshchensky, Foteh Rahimov, Alibek Taskynbayev, Lothar Schrott   +7 more
wiley   +1 more source